Quick Answer
The Radeon 840M and Radeon 8040S are both integrated graphics solutions from AMD, but they are designed for different computing platforms. The Radeon 840M is typically found in modern mobile laptops, while the Radeon 8040S is part of a desktop-focused accelerated processing unit (APU) series. Their performance and feature sets differ based on their intended use cases and underlying architectures.
Radeon 840M vs Radeon 8040S: Full Comparison
Introduction
Understanding the differences between integrated graphics solutions is important for users evaluating system performance for tasks like everyday computing, multimedia, and light gaming. This comparison examines the AMD Radeon 840M and the Radeon 8040S, two graphics units that share a brand name but serve distinct segments. We will analyze their architectures, performance capabilities, and typical use cases to provide a clear picture of where each one is generally applied.
Architecture and Platform
The fundamental difference lies in their platform design and release context.
- Radeon 840M: This is a mobile graphics processing unit (GPU) based on the modern RDNA 3.5 architecture. It is integrated into AMD’s “Hawk Point” mobile APUs (like the Ryzen 5 8640HS) and is designed for power-efficient performance in laptops.
- Radeon 8040S: This designation refers to the integrated Radeon Graphics within AMD’s desktop “Hawk Point” APUs (e.g., Ryzen 5 8500G). It is based on the older RDNA 2 architecture. The “8040S” naming indicates it’s part of a specific desktop APU series, not a standalone mobile GPU.
In essence, the 840M represents a newer GPU architecture built for laptops, while the 8040S is an older-generation iGPU found in certain budget or small-form-factor desktop systems.
Performance and Use Cases
Performance varies significantly due to the architectural generation, power targets, and system memory configuration.
- Gaming Performance: The Radeon 840M, with its RDNA 3.5 cores and support for technologies like AMD Fluid Motion Frames, generally offers better gaming performance in modern titles at 1080p with low to medium settings. The Radeon 8040S (RDNA 2) is more suited for less demanding esports titles or older games.
- Content Creation & Productivity: Both can handle basic video playback, web browsing, and office applications without issue. For more GPU-accelerated tasks like light video editing or photo work, the 840M typically has an advantage due to its newer media engines and architectural improvements.
- System Memory Dependency: As integrated solutions, both rely on system RAM. Their performance is heavily influenced by the memory’s speed (e.g., DDR5 vs. LPDDR5x) and configuration (dual-channel is strongly recommended).
Features and Technologies
The feature set reflects their architectural generations.
- Display Support: Both support modern display outputs like HDMI 2.1 and DisplayPort. The specific number and version of ports depend on the laptop or motherboard design.
- API and Codec Support: The Radeon 840M supports the latest graphics APIs and typically includes more advanced video codec encoding/decoding capabilities (like AV1) thanks to its newer media engine. The Radeon 8040S supports common codecs like H.264 and H.265/HEVC.
- Power Efficiency: The 840M is engineered for the strict thermal and power constraints of mobile devices. The 8040S, in a desktop APU, typically operates within a higher power envelope but is still efficient for its desktop class.
Comparison Table
| Feature | Radeon 840M | Radeon 8040S (iGPU) |
|---|---|---|
| Product Type | Mobile Integrated GPU | Desktop APU Integrated Graphics |
| Architecture | AMD RDNA 3.5 | AMD RDNA 2 |
| Typical Platform | Laptops (e.g., with Ryzen 5 8640HS) | Desktop PCs (e.g., with Ryzen 5 8500G) |
| Compute Units (CUs) | Typically 8 CUs | Typically 4 CUs |
| Ray Accelerators | 8 | 4 |
| GPU Clock Speed | Up to 2.9 GHz (Boost) | Up to ~1.8 GHz (varies by APU model) |
| Memory Support | System RAM (LPDDR5/x, DDR5) | System RAM (DDR5) |
| AV1 Codec Support | Yes, encode/decode | Decode only |
| AMD Fluid Motion Frames (AFMF) | Supported | Not Supported |
| Typical Use Case | Thin & light laptops, mainstream gaming, content creation on the go | Budget desktops, small form factor PCs, home/office systems |
Frequently Asked Questions (FAQ)
What is the main difference between the Radeon 840M and 8040S?
The primary difference is their platform and architecture. The Radeon 840M is a newer RDNA 3.5 mobile GPU for laptops, while the Radeon 8040S refers to the older RDNA 2 integrated graphics found within specific desktop APUs.
Which one is better for gaming, the 840M or 8040S?
The Radeon 840M generally provides better gaming performance due to its newer architecture, higher typical compute unit count, and support for frame generation technologies like AFMF. The 8040S is more suitable for basic or older games.
Can I upgrade the Radeon 840M or 8040S graphics?
No, both are integrated graphics solutions soldered onto their respective processors (APU). They cannot be upgraded separately. To improve graphics performance, you would need to choose a system with a different processor or add a discrete graphics card (in desktops that support it).
Does the Radeon 8040S support AV1 encoding?
Typically, the Radeon 8040S (RDNA 2) integrated graphics supports AV1 video decoding for playback but does not support hardware-accelerated AV1 encoding. The Radeon 840M (RDNA 3.5) generally supports both AV1 encode and decode.
Final Thoughts
The choice between a system featuring Radeon 840M graphics and one with a Radeon 8040S APU ultimately depends on the intended use case and form factor. The Radeon 840M is the more modern and capable solution for mobile computing, offering better performance and features for users who need graphics power in a laptop. The Radeon 8040S serves as a competent integrated graphics option for desktop systems where space, power efficiency, and cost are primary considerations, and discrete graphics are not required. By comparing their specifications, architectures, and typical applications, users can determine which solution aligns more closely with their computing needs.